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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 435 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.63 + 34 =
  2. 2.28 + 27 =
  3. 3.63 + 37 =
  4. 4.22 + 79 =
  5. 5.78 + 44 =
  6. 6.57 + 31 =
  7. 7.89 + 65 =
  8. 8.27 + 51 =
  9. 9.69 + 21 =
  10. 10.49 + 84 =
  11. 11.65 + 46 =
  12. 12.57 + 53 =
  13. 13.89 + 16 =
  14. 14.84 + 13 =
  15. 15.56 + 36 =
  16. 16.86 + 26 =
  17. 17.87 + 62 =
  18. 18.42 + 31 =
  19. 19.80 + 72 =
  20. 20.30 + 65 =
  21. 21.53 + 43 =
  22. 22.24 + 74 =
  23. 23.59 + 35 =
  24. 24.66 + 82 =
  25. 25.66 + 87 =
  26. 26.24 + 56 =
  27. 27.78 + 31 =
  28. 28.63 + 15 =
  29. 29.86 + 13 =
  30. 30.84 + 72 =
  31. 31.27 + 21 =
  32. 32.39 + 16 =
  33. 33.28 + 14 =
  34. 34.55 + 81 =
  35. 35.59 + 65 =
  36. 36.40 + 71 =
  37. 37.25 + 58 =
  38. 38.25 + 28 =
  39. 39.45 + 26 =
  40. 40.43 + 26 =

Answer key

  1. 97
  2. 55
  3. 100
  4. 101
  5. 122
  6. 88
  7. 154
  8. 78
  9. 90
  10. 133
  11. 111
  12. 110
  13. 105
  14. 97
  15. 92
  16. 112
  17. 149
  18. 73
  19. 152
  20. 95
  21. 96
  22. 98
  23. 94
  24. 148
  25. 153
  26. 80
  27. 109
  28. 78
  29. 99
  30. 156
  31. 48
  32. 55
  33. 42
  34. 136
  35. 124
  36. 111
  37. 83
  38. 53
  39. 71
  40. 69

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